IPCX Chillers - Dunham-Bush Americas

QUICK SELECTIONS AT A GLANCE○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○Unit Selection—Selection curves are located below.Unit size is determined by the intersection of the requiredcooling tons and leaving fluid temperature.Selections are based on an ethylene glycol solution witha freeze point 10°F below the evaporating temperature.Please contact the localrepresentative for selections at leaving temperaturesbelow 10°F.Horsepower Per Ton—Compressor horsepower per toncan be estimated from Figure 25A as a function of thecooled fluid leaving temperature and the condenserwater leaving temperature. As a rule of thumb, the curvevalues for horsepower at design conditions can bereduced by 15 percent to estimate annual averageelectric consumption. This reduction results fromoperation at lower annual average condenser watertemperatures resulting from annual average wet bulbtemperatures lower than design.Part Load Performance—The curve (Figure 25B) on thispage gives approximate percent power input as afunction of the percent of full load tons and appliesequally to all size units.Figure 25AHorsepower Per Ton2.01.51.0Horsepower Per Ton95°F85°FLeavingCondenserWater0.50 20 30 40 50Evaporator Leaving Fluid Temperature (°F)Figure 25BPercent Power1009080706050403020100Part Load Power Input10 20 30 40 50 60 70 80 90 100Percent LoadFigure 25CEvaporator Leaving Fluid Temperature (°F)5040302010IPCX Cooling Capacity120 180350 500 580 700 7502300 100 200 300 400 500 600 700 800Tons at 95°F Leaving Condenser Water TemperatureHighTemperatureMediumTemperatureLowTemperatureConsult factory for conditions below 10° Leaving Fluid Temperature.25